CPM Homework Help : A2C Problem 12-64

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Home > A2C > Chapter 12 > Lesson 12.1.4 > Problem 12-64

12-64.

Write each series in sigma notation and find the sum or an expression for the sum.

$47 + 34 + 21 + … + \left(−83\right)$
Hint (a):
What is the expression for the sequence?
More Help (a):
How many terms are there in the series?
Answer (a):
One possible answer:
$\sum_{k = 1}^{11}(60-13k)=-198$

$3+10 + 17 + … + \left(7n − 4\right)$
Hint (b):
Instead of going up to a specific term, this series sums up the first n terms of the sequence given in parentheses.

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